CN104496520A - Low-cost light mullite-based heat preservation material and preparation method thereof - Google Patents
Low-cost light mullite-based heat preservation material and preparation method thereof Download PDFInfo
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- CN104496520A CN104496520A CN201410705923.7A CN201410705923A CN104496520A CN 104496520 A CN104496520 A CN 104496520A CN 201410705923 A CN201410705923 A CN 201410705923A CN 104496520 A CN104496520 A CN 104496520A
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Abstract
The invention provides a low-cost light mullite-based heat preservation material and a preparation method thereof. The method comprises the following steps: (1) adding pulverized fuel ash, bauxite, glass powder, a dispersing agent and a foam stabilizer into water for mixing, performing ball milling, thereby obtaining primary slurry; (2) adding an aqueous solution of gelatin, and stirring, thereby obtaining ceramic slurry; (3) adding a foaming agent, and stirring, thereby obtaining foam slurry; (4) pouring the foam slurry into a mold, and performing gel solidification at room temperature, thereby obtaining a wet green body; (5) demolding after moisture on the surface of the wet green body evaporates, and performing air drying, thereby obtaining a green body; and (6) sintering the green body in a high-temperature sintering furnace, thereby obtaining the mullite-based thermal insulation material. The industrial waste powder pulverized fuel ash and mineral bauxite are taken as main raw materials, a method for combining mechanical foaming and gelatin gel solidification molding is utilized, the cost is saved, and the environment is protected; and moreover, the prepared material has the advantages of low thermal conductivity, low specific gravity and high thermal stability and has the unique advantages of good creep resistance, erosion resistance and the like.
Description
Technical field
The invention belongs to heat preserving and insulating material technical field, what be specifically related to is a kind of low cost light-weight mullite base heat preserving and insulating material and preparation method thereof.
Background technology
Porous ceramics, owing to having low heat conduction, low density, high hole, the excellent properties such as high temperature resistant and corrosion-resistant, is widely used in preparing filtering membrane, support of the catalyst, burner and lagging material etc.The present economy of China is in the period of high speed development, and the energy and environmental issue become increasingly conspicuous, so porous ceramics is used as heat preserving and insulating material, has huge development and apply prospect in daily life and in producing.
Mullite is a kind of stupalith of classics, it is the crystalline phase of unique stable existence in standard atmosphere pressure silicoaluminate system, it has unique advantage, as low-gravity, good creep resistance, chemical stability and Heat stability is good, low thermal conductivity, be relatively applicable to being applied to the heat insulation field of industrial heat preservation.Although the light-weight mullite heat preserving and insulating material preparing low thermal conductivity has in recent years had many progress, industrialization scale operation while guaranteed performance excellence, must also require cheap raw material sources and the preparation technology of simple economy.The raw material of current mullite heat preserving and insulating material is industrial mullite powder or aluminum oxide and silicon-dioxide mainly, and final sintering temperature general higher (being greater than 1300 DEG C) in sintering process, and cause cost higher, processing condition are high.
Raw material of the present invention is flyash and bauxitic clay mainly, and flyash is a kind of solid waste, and bauxitic clay is a kind of natural mineral, and these two kinds of raw material sources are extensive, with low cost, and the comprehensive utilization of flyash can also solve problem of environmental pollution.Preparation technology of the present invention adopts the method for mechanical foaming and gelatin gel solidification, overcomes the shortcoming of the low and a large amount of discharge of traditional interpolation pore-forming material porosity, both cost-saving also protection of the environments.
Summary of the invention
To the invention provides with flyash and bauxitic clay as raw material, utilize mechanical stirring to foam and gelatin gel solidifies a kind of low cost, lightweight, high porosity, the preparation method of heat preserving and insulating material of lower thermal conductivity and the mullite heat preserving and insulating material of preparation thereof that combine.
A preparation method for low cost light-weight mullite base heat preserving and insulating material, is characterized in that: step is as follows:
(1) by flyash and bauxitic clay in mass ratio 1:2 ~ 1:1 be added to the water and stir, then to add after the mixing of glass powder, dispersion agent and suds-stabilizing agent ball milling 20 ~ 24h again, obtain elementary slurry;
(2) be 40 ~ 50 DEG C of Water Unders bath preheatings by elementary slurry in temperature, then add aqueous gelatin solution, be uniformly mixed, obtain the ceramic size that solid content is 35 ~ 50wt%;
(3) in ceramic size, add whipping agent, and rapid stirring produces a large amount of foam, obtains foamed slurry;
(4) pour in mould by foamed slurry, gel solidification 20 ~ 24h under room temperature, obtains wet base;
(5) demoulding after wet base surface-moisture evaporate to dryness, under room temperature, natural air drying 1 ~ 2 day, obtains green compact;
(6) green compact are sintered in high temperature sintering furnace, obtain mullite heat preserving and insulating material.
Further preferred version: in described step (1) quality of glass powder, dispersion agent, suds-stabilizing agent be respectively flyash and bauxitic clay quality and 0 ~ 7wt%, 0.2 ~ 0.5wt%, 0.2 ~ 0.6wt%.
More excellent scheme: described suds-stabilizing agent is Xylo-Mucine or sodium polyacrylate; Described dispersion agent is Triammonium citrate or Sodium hexametaphosphate 99.
Further preferred version: in described step (2), in ceramic size, gelatine content is account for ceramic size quality 3 ~ 6%.
Further preferred version: in described step (3), whipping agent is sodium lauryl sulphate or Sodium dodecylbenzene sulfonate, and its consumption is 0.3 ~ 0.6% of ceramic size quality; The rotating speed of described rapid stirring is 800 ~ 1000rpm, time 3 ~ 5min.
Further preferred version: in described step (4), mould is the mould that do not seep water that glass, stainless steel, silica gel or tetrafluoroethylene make.
Further preferred version: in described step (6), sintering condition is: with the temperature rise rate of 1.5 ~ 2 DEG C/min, green compact are heated to 600 DEG C, insulation 1 ~ 2h; Continued to be heated to 1100 ~ 1300 DEG C with the temperature rise rate of 5 ~ 10 DEG C/min again, insulation 2 ~ 4h; Then naturally cool to room temperature again after making it be cooled to 500 DEG C with the rate of temperature fall of 5 ~ 10 DEG C/min, obtain mullite heat preserving and insulating material.
Another goal of the invention of the present invention is to provide a kind of mullite heat preserving and insulating material prepared by above-mentioned preparation method, and its porosity is 70 ~ 90%, unit weight is 0.25 ~ 0.50g/cm
3, thermal conductivity is 0.05 ~ 0.15W/mK, ultimate compression strength is 1.45 ~ 4.58MPa.
Compared with existing porous ceramics heat preserving and insulating material, advantage of the present invention is:
1, the heat preserving and insulating material that prepared by the present invention take mullite as skeleton, so the mullite heat preserving and insulating material of preparation has low thermal conductivity, low-gravity, Heat stability is good, has the advantage that good creep resistance and resistance to fouling etc. are unique simultaneously.
2, raw material of the present invention mainly flyash and bauxitic clay, flyash is a kind of solid waste, and bauxitic clay is a kind of natural mineral, and these two kinds of raw material sources are extensive, with low cost, and the comprehensive utilization of flyash can also solve problem of environmental pollution.
3, the present invention adopts mechanical stirring to foam and the method that combines of gelatin gel curing molding, in the process without the need to organic formwork or add organic volatilizable pore-forming material, so do not discharge in a large number, and both cost-saving also protection of the environments.
4, preparation technology of the present invention is simple, easy handling, and prepares the porosity of material and thermal conductivity can be regulated by solid load and sintering temperature.
5, the present invention makes material just have stronger mechanical strength at a relatively low sintering temperature by adding solubility promoter glass powder, thus reduces sintering temperature, and sintering temperature is 1100-1300 DEG C, has saved cost.
Accompanying drawing explanation
Fig. 1 is the microcosmic scanning electron microscope (SEM) photograph of the section of the mullite heat preserving and insulating material of embodiment 1,
Fig. 2 is the XRD spectra of the mullite heat preserving and insulating material of embodiment 1;
In Fig. 2, M represents mullite phase, and C represents corundum phase, and A represents lime feldspar phase.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Following examples flyash used takes from Hefei ,Anhui Zhong Cheng power & light company; Bauxitic clay provides for Gongyi, Henan Song Feng mining industry factory; Gelatin, suds-stabilizing agent Xylo-Mucine (CMC) and sodium polyacrylate (PAAS), dispersion agent Triammonium citrate (TAC) and Sodium hexametaphosphate 99 (SHMP), whipping agent sodium lauryl sulphate (K12) and Sodium dodecylbenzene sulfonate (SDBS) are Chemical Reagent Co., Ltd., Sinopharm Group to be provided; Glass powder provides for glasswork of Hefei City; Shui Wei city is for tap water.
The unit weight of sample and open-cell porosity are obtained by the measurement of Archimedes's drainage, and result gets the mean value of three samples; Use the thermal conductivity of heat conduction coefficient tester measure sample, result gets the mean value of double measurement result; Use electronics sound state fatigue machine trier measure sample ultimate compression strength at room temperature, result gets the mean value of double measurement result.
Embodiment 1
(1) 20g flyash and 30g bauxitic clay are added to the water stirring, and add 0.15g suds-stabilizing agent CMC, 0.25g dispersion agent TAC, after ball milling 24 h, obtain elementary slurry.
(2) mixed with gelatin solution (being formed in 40 DEG C of water by Gelatin in advance) after 40 DEG C by heating in water bath by elementary slurry, to obtain gelatine content be 4wt% and solid load is the ceramic size 143g of 35wt%;
(3) add 0.43g whipping agent K12, under the condition of rotating speed 800 rpm, mechanical stirring slurry 3 min, produces a large amount of foam, obtains foamed slurry;
(4) pour in mould by foamed slurry, at room temperature gel solidification 24 h, obtains wet base;
(5) treat wet base surface-moisture evaporate to dryness, the demoulding, under room temperature, natural air drying 2 days, obtains green compact;
(6) by green compact in high temperature sintering furnace in sintering, with the temperature rise rate of 2 DEG C/min, green compact are heated to 600 DEG C, insulation 1h; Continued to be heated to 1100 DEG C with the temperature rise rate of 5 DEG C/min again, insulation 2h; Then naturally cool to room temperature again after making it be cooled to 500 DEG C with the rate of temperature fall of 10 DEG C/min, obtain mullite heat preserving and insulating material.
The open-cell porosity of the mullite heat preserving and insulating material sample prepared after testing is 92.9%, unit weight is 0.26g/cm
3, thermal conductivity is 0.058W/mK, ultimate compression strength is 1.46MPa.
The microcosmic scanning electron microscope (SEM) photograph of the section of mullite heat preserving and insulating material prepared by the present embodiment 1 as shown in Figure 1, as can be seen from Figure 1, the light-weight mullite material internal after sintering is vesicular structure, and spherical pore does not have specific orientation, be evenly distributed, isotropy.
According to the composition and engineering condition in embodiment 1, be incubated the XRD spectra of 2h gained sample after green compact are sintered to 1100 DEG C, 1200 DEG C and 1300 DEG C respectively as shown in Figure 2.Can find from Fig. 2, when green sintering outlet temperature is 1100 DEG C, gained sample has generated mullite phase M, but also there is a small amount of unreacted corundum phase C and lime feldspar phase A, and along with the rising of sintering temperature, mullite phase M increases, and when sintering temperature to 1300 DEG C, has been substantially all mullite phase M in sample.Illustrate that the sintering outlet temperature of mullite heat preserving and insulating material is suitably 1100 ~ 1300 DEG C.
Embodiment 2
(1) 20g flyash and 30g bauxitic clay are added to the water stirring, and add suds-stabilizing agent CMC, 0.3g dispersion agent TAC of 0.25g, after ball milling 24 h is carried out to them, obtain elementary slurry;
(2) mixed with gelatin solution (being formed in 40 DEG C of water by Gelatin in advance) after 40 DEG C by heating in water bath by elementary slurry, to obtain gelatine content be 4wt% and solid load is the ceramic size 100g that 50wt% is stable;
(3) add 0.3g whipping agent K12, under the condition of rotating speed 800 rpm, mechanical stirring slurry 3 min, produces a large amount of foam, obtains foamed slurry;
(4) pour in mould by foamed slurry, under room temperature, gel solidification 24 h, obtains wet base;
(5) treat wet base surface-moisture evaporate to dryness, the demoulding, under room temperature, natural air drying 2 days, obtains green compact;
(6) by green compact in high temperature sintering furnace in sintering, with the temperature rise rate of 2 DEG C/min, green compact are heated to 600 DEG C, be incubated 1 h, continued to be heated to 1100 DEG C with the temperature rise rate of 5 DEG C/min again, be incubated 2 h, naturally cool to room temperature again after then making it be cooled to 500 DEG C with the rate of temperature fall of 10 DEG C/min, obtain mullite heat preserving and insulating material.
The open-cell porosity of the mullite heat preserving and insulating material sample prepared after testing is 84.6%, unit weight is 0.47g/cm
3, thermal conductivity is 0.074W/mK, ultimate compression strength is 1.94MPa.
Embodiment 3
(1) 25g flyash and 25g bauxitic clay are added to the water stirring, and add suds-stabilizing agent CMC, 0.25g dispersion agent TAC and the 2.5g glass powder of 0.15g, after ball milling 20h, obtain elementary slurry;
(2) mixed with gelatin solution (being formed in 40 DEG C of water by Gelatin in advance) after 45 DEG C by heating in water bath by elementary slurry, to obtain gelatine content be 4wt% and solid load is the ceramic size 150g that 35wt% is stable;
(3) add 0.45 g whipping agent K12, under the condition of rotating speed 800 rpm, mechanical stirring slurry 3 min, produces a large amount of foam, obtains foamed slurry;
(4) pour in mould by foamed slurry, under room temperature, gel solidification 20 h, obtains wet base;
(5) treat wet base surface-moisture evaporate to dryness, the demoulding, under room temperature, natural air drying 2 days, obtains green compact;
(6) by green compact in high temperature sintering furnace in sintering, with the temperature rise rate of 2 DEG C/min, green compact are heated to 600 DEG C, be incubated 1 h, continued to be heated to 1100 DEG C with the temperature rise rate of 5 DEG C/min again, be incubated 2 h, naturally cool to room temperature again after then making it be cooled to 500 DEG C with the rate of temperature fall of 10 DEG C/min, obtain mullite heat preserving and insulating material.
The open-cell porosity of the mullite heat preserving and insulating material sample prepared after testing is 89.4%, unit weight is 0.33g/cm
3, thermal conductivity is 0.071W/mK, ultimate compression strength is 2.40MPa.
Embodiment 4
(1) 20g flyash and 40g bauxitic clay are added to the water stirring, and add the suds-stabilizing agent sodium polyacrylate of 0.12g, 0.12g sodium hexametaphosphate dispersant and 3.0g glass powder, after ball milling 24 h, obtain elementary slurry;
(2) mixed with gelatin solution (being formed in 40 DEG C of water by Gelatin in advance) after 50 DEG C by heating in water bath by elementary slurry, to obtain gelatine content be 6wt% and solid load is the ceramic size 158g that 40wt% is stable;
(3) add the whipping agent Sodium dodecylbenzene sulfonate of ceramic size quality 0.69, under the condition of rotating speed 1000 rpm, mechanical stirring slurry 5 min, produces a large amount of foam, obtains foamed slurry;
(4) pour in mould by foamed slurry, under room temperature, gel solidification 24 h, obtains wet base;
(5) treat wet base surface-moisture evaporate to dryness, the demoulding, under room temperature, natural air drying 1 day, obtains green compact;
(6) by green compact in high temperature sintering furnace in sintering, with the temperature rise rate of 1.5 DEG C/min, green compact are heated to 600 DEG C, insulation 2h, continued to be heated to 1300 DEG C with the temperature rise rate of 10 DEG C/min again, be incubated 2 h, naturally cool to room temperature again after then making it be cooled to 500 DEG C with the rate of temperature fall of 5 DEG C/min, obtain mullite heat preserving and insulating material.
The open-cell porosity of the mullite heat preserving and insulating material sample prepared after testing is 88.5%, unit weight is 0.38g/cm
3, thermal conductivity is 0.11W/mK, ultimate compression strength is 2.83MPa.
Above embodiment is not limited only to protection scope of the present invention, all modify based on fundamental idea of the invention or change all belong to protection scope of the present invention.
Claims (8)
1. a preparation method for low cost light-weight mullite base heat preserving and insulating material, is characterized in that: step is as follows:
(1) by flyash and bauxitic clay in mass ratio 1:2 ~ 1:1 be added to the water and stir, then to add after the mixing of glass powder, dispersion agent and suds-stabilizing agent ball milling 20 ~ 24h again, obtain elementary slurry;
(2) be 40 ~ 50 DEG C of Water Unders bath preheatings by elementary slurry in temperature, then add aqueous gelatin solution, be uniformly mixed, obtain the ceramic size that solid content is 35 ~ 50wt%;
(3) in ceramic size, add whipping agent, and rapid stirring produces a large amount of foam, obtains foamed slurry;
(4) pour in mould by foamed slurry, gel solidification 20 ~ 24h under room temperature, obtains wet base;
(5) demoulding after wet base surface-moisture evaporate to dryness, under room temperature, natural air drying 1 ~ 2 day, obtains green compact;
(6) green compact are sintered in high temperature sintering furnace, obtain mullite heat preserving and insulating material.
2. preparation method according to claim 1, is characterized in that: in described step (1) quality of glass powder, dispersion agent, suds-stabilizing agent be respectively flyash and bauxitic clay quality and 0 ~ 7wt%, 0.2 ~ 0.5wt%, 0.2 ~ 0.6wt%.
3. preparation method according to claim 1 and 2, is characterized in that: described suds-stabilizing agent is Xylo-Mucine or sodium polyacrylate; Described dispersion agent is Triammonium citrate or Sodium hexametaphosphate 99.
4. preparation method according to claim 1, is characterized in that: in described step (2), in ceramic size, gelatine content is account for ceramic size quality 3 ~ 6%.
5. preparation method according to claim 1, is characterized in that: in described step (3), whipping agent is sodium lauryl sulphate or Sodium dodecylbenzene sulfonate, and its consumption is 0.3 ~ 0.6% of ceramic size quality; The rotating speed of described rapid stirring is 800 ~ 1000rpm, time 3 ~ 5min.
6. preparation method according to claim 1, is characterized in that: in described step (4), mould is the mould that do not seep water that glass, stainless steel, silica gel or tetrafluoroethylene make.
7. preparation method according to claim 1, is characterized in that: in described step (6), sintering condition is: with the temperature rise rate of 1.5 ~ 2 DEG C/min, green compact are heated to 600 DEG C, insulation 1 ~ 2h; Continued to be heated to 1100 ~ 1300 DEG C with the temperature rise rate of 5 ~ 10 DEG C/min again, insulation 2 ~ 4h; Then naturally cool to room temperature again after making it be cooled to 500 DEG C with the rate of temperature fall of 5 ~ 10 DEG C/min, obtain mullite heat preserving and insulating material.
8. as a mullite heat preserving and insulating material prepared by any one of claim 1-7 preparation method, it is characterized in that: its porosity is 70 ~ 90%, unit weight is 0.25 ~ 0.50g/cm
3, thermal conductivity is 0.05 ~ 0.15W/mK, ultimate compression strength is 1.45 ~ 4.58MPa.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106242637A (en) * | 2016-08-11 | 2016-12-21 | 华北水利水电大学 | A kind of preparation method of porous mullite corundum ceramic |
| CN106316444A (en) * | 2016-08-11 | 2017-01-11 | 华北水利水电大学 | Preparing method of porous mullite ceramic |
| CN108395214A (en) * | 2018-05-11 | 2018-08-14 | 乐清市城镇建设工程公司 | A kind of room is built with heat preservation noise reduction building panel and preparation method thereof |
| CN108558366A (en) * | 2018-01-26 | 2018-09-21 | 中北大学 | A kind of preparation method of high-efficiency water-absorbing water conservation pulverized coal-ash-based porous material |
| GB2566431A (en) * | 2017-06-13 | 2019-03-20 | Patrick Sherry James | Improvements in and relating to waste treatment |
| CN110511030A (en) * | 2019-09-12 | 2019-11-29 | 北京交通大学 | A kind of graphite slurry foaming-gelatin is condensed into shape for the method for foamed carbon material |
| CN111868006A (en) * | 2018-03-16 | 2020-10-30 | 西门子股份公司 | Method for producing a ceramic absorber, ceramic absorber and use thereof |
| CN112038029A (en) * | 2020-07-08 | 2020-12-04 | 孝感华工高理电子有限公司 | Subminiature radial glass-packaged thermistor and manufacturing method thereof |
| CN112299873A (en) * | 2020-09-22 | 2021-02-02 | 新沂市锡沂高新材料产业技术研究院有限公司 | Preparation method of heat insulation material of electric arc furnace for quartz melting |
| CN112876225A (en) * | 2021-02-08 | 2021-06-01 | 新疆硅质耐火材料有限公司 | Sintered high-temperature-resistant light heat-insulating material and preparation method thereof |
| CN114524683A (en) * | 2022-03-23 | 2022-05-24 | 天一建设发展有限公司 | Multifunctional thin heat-insulating material for building outer wall and preparation method thereof |
| CN115231944A (en) * | 2022-08-11 | 2022-10-25 | 西北工业大学 | Low-shrinkage mullite-based porous ceramic and preparation method thereof |
| CN115448708A (en) * | 2022-10-10 | 2022-12-09 | 天津大学 | Method for in-situ synthesis of high-strength low-heat-conductivity porous mullite ceramic by utilizing high-alumina fly ash pretreatment |
| CN115536922A (en) * | 2022-10-29 | 2022-12-30 | 福建省莆田富邦实业有限公司 | Lightweight high-resilience sole material and sports shoes |
| CN117105652A (en) * | 2023-10-24 | 2023-11-24 | 山东盛日奥鹏环保新材料集团股份有限公司 | Method for preparing mullite material by utilizing FCC spent catalyst and fly ash through low-temperature sintering and prepared mullite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106242637A (en) * | 2016-08-11 | 2016-12-21 | 华北水利水电大学 | A kind of preparation method of porous mullite corundum ceramic |
| CN106316444A (en) * | 2016-08-11 | 2017-01-11 | 华北水利水电大学 | Preparing method of porous mullite ceramic |
| GB2566431A (en) * | 2017-06-13 | 2019-03-20 | Patrick Sherry James | Improvements in and relating to waste treatment |
| CN108558366A (en) * | 2018-01-26 | 2018-09-21 | 中北大学 | A kind of preparation method of high-efficiency water-absorbing water conservation pulverized coal-ash-based porous material |
| CN111868006A (en) * | 2018-03-16 | 2020-10-30 | 西门子股份公司 | Method for producing a ceramic absorber, ceramic absorber and use thereof |
| CN108395214A (en) * | 2018-05-11 | 2018-08-14 | 乐清市城镇建设工程公司 | A kind of room is built with heat preservation noise reduction building panel and preparation method thereof |
| CN110511030A (en) * | 2019-09-12 | 2019-11-29 | 北京交通大学 | A kind of graphite slurry foaming-gelatin is condensed into shape for the method for foamed carbon material |
| CN112038029A (en) * | 2020-07-08 | 2020-12-04 | 孝感华工高理电子有限公司 | Subminiature radial glass-packaged thermistor and manufacturing method thereof |
| CN112299873A (en) * | 2020-09-22 | 2021-02-02 | 新沂市锡沂高新材料产业技术研究院有限公司 | Preparation method of heat insulation material of electric arc furnace for quartz melting |
| CN112299873B (en) * | 2020-09-22 | 2022-08-26 | 新沂市锡沂高新材料产业技术研究院有限公司 | Preparation method of heat insulation material of electric arc furnace for quartz melting |
| CN112876225A (en) * | 2021-02-08 | 2021-06-01 | 新疆硅质耐火材料有限公司 | Sintered high-temperature-resistant light heat-insulating material and preparation method thereof |
| CN114524683A (en) * | 2022-03-23 | 2022-05-24 | 天一建设发展有限公司 | Multifunctional thin heat-insulating material for building outer wall and preparation method thereof |
| CN115231944A (en) * | 2022-08-11 | 2022-10-25 | 西北工业大学 | Low-shrinkage mullite-based porous ceramic and preparation method thereof |
| CN115448708A (en) * | 2022-10-10 | 2022-12-09 | 天津大学 | Method for in-situ synthesis of high-strength low-heat-conductivity porous mullite ceramic by utilizing high-alumina fly ash pretreatment |
| CN115448708B (en) * | 2022-10-10 | 2023-05-26 | 天津大学 | Method for in-situ synthesis of high-strength low-heat-conductivity porous mullite ceramic by high-alumina fly ash pretreatment |
| CN115536922A (en) * | 2022-10-29 | 2022-12-30 | 福建省莆田富邦实业有限公司 | Lightweight high-resilience sole material and sports shoes |
| CN117105652A (en) * | 2023-10-24 | 2023-11-24 | 山东盛日奥鹏环保新材料集团股份有限公司 | Method for preparing mullite material by utilizing FCC spent catalyst and fly ash through low-temperature sintering and prepared mullite material |
| CN117105652B (en) * | 2023-10-24 | 2023-12-19 | 山东盛日奥鹏环保新材料集团股份有限公司 | Method for preparing mullite material by utilizing FCC spent catalyst and fly ash through low-temperature sintering and prepared mullite material |
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Application publication date: 20150408 |